Ice-machine.



No. 69!,238. Patented .Ian. M, I902. T. H. BUTLER & 0. HAMMOND.

l6 E M A C H IN E.

(Application filed A r. 26, 1901.

(No Model.)

[ .INVENTORJ 11 L, Alla rue m: uqwn v'; vzrzns 00.. PHOTO-LUNG. msum UNITED STATES PATENI QFFICE.

THOMAS H. BUTLER AND ORMOND HAMMOND, QF BALTIMORE, MARYLAND.

ICE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 691,238, dated January 14, 1902.

Application filed April 26, 1901. Serial No. 57,552. (No model.)

To all whom it may concern:

Be it known that we, THOMAS H. BUTLER and ORMOND HAMMoND,citizens of the United States, residing at Baltimore city, in the State it consists of a novel means for separating the,

ice from the freezing-tank in which the freezing-plate is arranged.

In the drawings, Figure 1 is a plan view of the apparatus. Fig. 2 is a front view of the same. Fig. 3 is a section through a part of the freezing-tank.

A is a portion of a freezing-tank, and B is a freezing-plate arranged in the said tank. The freezing-plate is of any approved construction, and b is a .pipe for admitting the freezing liquid to it.

As many freezing-plates as desired can be used by making the tank longer. The ice forms upon the freezing-plate and adheres to the sides and bottom of the tank adjacent to the freezing-plate but a layer of water remains between the cake of ice and the end of the tank and between each two adjacent cakes of ice when a number of freezing-plates are used.

0 represents thawing-off pipes, which are partially sunk into grooves in the sides and bottom of the freezing-tank. These pipes are arranged in a series and are connected to an inlet-manifold D and to an outlet-manifold D. Each pipe 0 has a separate inletvalve 0 and an outlet-valve c. The pipes C are covered by thin sheet -metal plates 01, which rest upon the small portions of the pipes which project from the grooves.

E is an air-compressor of any approved construction, and e is its air-delivery pipe, provided with an air-reservoir e.

F is a boiler of any approved construction,

and f is the smoke-stack, which is connected to the furnace of the boiler.

Gis a chamber which surrounds the smokestack. This chamber is connected to the delivery-pipe e, and it is provided with a pipe g, which connects it to the inlet-manifold D.

In carrying out this invention the air for the thawing-oft pipes may be heated by any approved means, but that shown is preferred, because it enables heat to be utilized which otherwise would be wasted. The air is forced by the compressor through the heating-chamber G into the thawing-01f pipes,and its progress through the thawing-01f pipes is regulated by the various inlet and outlet valves, so that the heat may be applied to the best advantage. When the sides and bottom of the cake of ice are thawed by the hot air, the

cake is thawed from the freezing-plate by admitting hot fluid to the freezing-plate in the usual manner,

What we claim is- 1. The combination, with a freezing-tank, and a freezing-plate arranged in it; of a series of thawing-off pipes arranged in the tank adjacent to the said plate,.a separate inlet and outlet valve for regulating the passage of air through each thawing-oft pipe, an airinlet manifold connecting the series of pipes, an air-compressor and intermediate pipes for forcing air into the said manifold, an air-heating drum arranged between the said compressorand manifold, and means for heating the air in its passage through the said drum, substantially as set forth.

2. The combination, with a freezing-tank, and a freezing-plate arranged in it; of a series of thawing-off pipes partially let into grooves in the sides and bottom of the said tank, and metal plates which bear on the projecting portions of the said pipes, substantially as set forth.

In testimony whereof we aifix our signatures in presence of two witnesses.

THOMAS H. BUTLER. ORMOND HAMMOND.

WVitnesses:

W. N. FINLEY, A. G. HUNTER. 

